Computer monitor indicator light black screen No show what's going on

The computer monitor LED is on, but the screen is black, and it is recommended that the following methods be followed:

1. Shaking the mouse or tapping the keyboard to see if you can return the display, whether the machine into energy-saving mode

2. Check the power set scheme, whether to set the monitor power supply timing shutdown and energy-saving mode, cancel can

3. Changes in the use of the monitor resolution, refresh frequency caused by overclocking reason black screen without display, restart the host, press the keyboard "F8" to choose to enter the VGA mode, reset the display resolution and refresh frequency after restart.